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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'a71ec1143b19b365abd449cbc1808c0df2e599ee3e04a9eb86de6832528422a6' 
  AND token = 'LEHOwMmJ+RR7jpTpfI6CmubjCbeV1bcHLKsM7BMEd2M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}