Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c606278b19f3fca3d71aa8143099958fbac6b1e3c301efb199f46eee204b4f28' 
  AND token = 'wLiwd99Rnzi8UuiXxDHdfdFOtbgG11R/QeiR7fbL2RA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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