Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '442b4bcfdf649322a095f2f205c9607686791f0f43e4c13f2a7f202c52a788a8' 
  AND token = 'GtsfyFEKTTYaqb4xGkwEdqTKmmNm6XMlwx7PEcNVNIg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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