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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3314d188ea0ed8a7ff9a2eed7569b65f6d49e7556525bf8c9bfd6f5d88f20ecc' 
  AND token = '1EWszSDP1B8H3wN1cp07KY0/fgxgwt4YscwFyObO+78=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}