Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '326c28a640328160dd6a833aa5a99119c3f0ff44f966a8708d930a88ccf5e6a2' 
  AND token = 'VSeIwo4YF6vF22RbRxxbpr+ttGqee1Lk1xE4Qn4DqyA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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