Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cd919455165bc0477d935d795e129baf505f84322e8277572a1c734c2236cc39' 
  AND token = 'arWg6DHhj766dbg61IsEsdK3n/IMdaK3FYrRFoQnHvE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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