Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '35ca61509a9942887adbd406e20e2353425a54f88e3f506126e91fe16fb86bb3' 
  AND token = 'AKh7H792iVRuXwRlBzr251BC1SCfn5Ufl6+CCKl143A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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