Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8dbee5f5445082a054cc6a3bbc294f31d0d0c91e0c34b7d7eb4c3d087ec0eeba' 
  AND token = 'r94+bNT4mTsbVle+BhHnAnSvp+3tiSNVRiCZ9l6jpS0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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