Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6d04a994d3ad5a0a145541301e4717492814baf74b56119f205007fb3cc43f52' 
  AND token = 'lTH4HVN/c5xyxz6i0sMLlkYXd+/u9uIAvnaK5xrQCyQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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