Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '77da5f4f575a954fcd603d0be1ea4e9bcb5af071c2782a7365c8ab212d298ecb' 
  AND token = 'tFnBmz519A+ESYkMh1wYh3EBL581MlN9mC+xBMQ28aM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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