Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '59381b019725d44b704301557838e0f0923584c67df98d0f239035dd468c5126' 
  AND token = 'gXNTkL4TdQclqX8iq/JWXWbJl4QYJREUinsYPt3/71A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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