Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '62461f9625c2414ada26239b5da4f79746a2195a06d56680b9302794e740b55f' 
  AND token = 'QwAcl7wvhdu4f5Xn3VEqElO+EcYUIUtvP28t0QUfZfo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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