Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '70ff2754df03c5e575d9a8f6c7224e456ec85cf8183954725229b593b92bbb66' 
  AND token = '8zGl5L9rEePZyR1KEqjRGMHmS7SmDEuIlMAYVcBdY3A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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