Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '55d5ab20761ce7c8b7fc333330c4acc92777e8be7693639350a7eb348eb41f01' 
  AND token = '04nsRvrDgcMMq0cAZYJf+ik2axZG36PaPROd+Id0n/U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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