Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c1acfee15a27656e82190831df807e852c82ff57c54d9fc4a98bbdd8c47482d4' 
  AND token = 'WmvffH4bX2deC5Cx0NoHt4dInlZ+HGDj9/cI1LMfOek=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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