Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e0750248617e752ed35156d9a157306bac96cf199940c66d1f1b77d1caadcef' 
  AND token = 'tjtV3kJ9qMGC9HXTIeqRZi9Irm05cNiF1E59PLlw9Y4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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