Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8b9a2df2eeafc5e9f9de213a297d779ee315638216566268bfa3de2ccb213d74' 
  AND token = 'pDyVXlP2ZnO2E6/7DLKPOMelBb2mXW5ee492eeRgz7o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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