Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '693f7064b6db4f6b4db4e69b4cf3060e34b35fdc79131b4f3525c0bef96f5af7' 
  AND token = 'Nt3IIGon7Uv2P0qHcr12Cke0+/pq0Rj0oJTq8ynW62c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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