Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e4bb6b8a24bb882d0e38f01c476d6cfec319dcdfa182729569d2aa9230a80651' 
  AND token = 'QdiyUkDS4o1rUTvRDY4Xix8lzk3asmYzgaJH8ZB3XPU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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