Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dc318292e20c0206cf71ce26fc93b3af4fd26d41803f013abbf88327dcb2bb68' 
  AND token = 'i7gGpkyUjRGydTNO18BsTUHdVTrpi9z7PiOC0iNPifc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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