Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0fbb9e8f73960aa0931b35c6d3b43c1b7700ee81a2764bca94cbf0008b0ed53e' 
  AND token = 'XFyhfictwoNN9sHfdCrwk3Jz+6jK4lxVEaM4KpARWh8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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