Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dffaf07c5424995bad25ed3c41b503b3bc25912cdf3bfedbafa2faaac85104c7' 
  AND token = 'TKTEk9/UFBXlxBO8IFIUCAitK/dDBm8tpTQUZ8o7054=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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