Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c232af9c6c89bb02e27a02084171dc24339ff27901d9a57f27f90ba2aaeb1050' 
  AND token = 'mVI2wrtsbaF+VooeLYNjZPvER7j71veZm+gYLVZztbQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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