Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2c7571bee0b88ef653e8e52518ce86ba1b1bf4751e61076e36dde2162e7d106' 
  AND token = 'Y8VGF1G6q/lSt6B1zn19pMHROVL5R7bi30NaDYsJLPE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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