Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'daed969361941040c9e85552dc1c8123372e2c557992bbb52cc479504a284b5f' 
  AND token = 'D5IkTFhwBmUaLTB1igO69viosqeDsGtYOFpnmxqn6EM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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