Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2934272b192544bec59c812e0d24c437c4dbcea6ab1212355d6c655e0470cb0a' 
  AND token = 'DzpeUMpA2+BYdvoUHSphCXQVqu35Y05yZ3VM2ftsNUA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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