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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'f05b6cd5a7ea89ea918c84f2a5ca1cb2d064c68c20618390e44aa72eef2c3f04' 
  AND token = 'WIiGKOPTRNgZC0JEL7of9KvFEF/y+HQAED4W/u0R3AM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

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