SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b95ac5c0aad66e9d35221d2ba1487e7b61ae7a7186ae4fa2b5d644de314ef348' 
  AND token = 'L/s7v9OvGEgt5uC1BoFjYD6xtgNJpSq+J2+Kl7VFMWw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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