Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '236a3f2f724ddd9bc97a790a02015532090eab09db76398e89d4f5f1934ddaca' 
  AND token = 'LkgdPMyQ/atf1Rvi7nYg8UdPm5o/3elAErTXfELktJI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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