Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3a02d8cd2bd27be63c57bb40df25c75f291ffcebd73dd3830a78f5ba2c1cf837' 
  AND token = 'Z+48Q51+kPKAp34BN9RRO/8lEY60EyMVm7gsf2S5b5k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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