Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c3ee24c1c63bcca3575f2f70576080bbad88ac9ff7bcd7e6882fa39e5b39c150' 
  AND token = '5NqQtx54RAAeF7WG9zJPiRdyYbcglvaBWeqFgH8oS+o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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