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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'dfaeefa3e0c5261c6d72c99220166eb555ef9f05486e6b0fa05989eaaae498e1' 
  AND token = 'Y8HqibqG4x1+e3fqbqZIzRSqBlPo8REro0s45D4KIPI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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