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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'ef2fcf16817b16a901e4cca590cdb92a10a7ad6fcf4d222fc70db958d7c70d00' 
  AND token = 'PYI2bUBVXXMaR99BTUfRQb4YW4hG+yq9q0U+zd+QKJE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

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