Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d0e0009906ecf06a3ab2eff9b1006c259a42f9761086dbe07de3ff56a6a3c00' 
  AND token = '+fofr68Un02rJ6vtugSC4GqauNoBlf2QrIROcHHTAgA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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