Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '970a9a177115c2d58aa6fe4cf109448d9df0e7fa3f47d44215ba2dd50aec50b0' 
  AND token = 'HL9VccNY/t9WgVzQiPHwCUsjYtkwVUpBfdKASzymNqI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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