Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b0907a66fc49ff3b6c8c59efdbcae0b304043d014b1f28a6b8bcb976fa6c3cf6' 
  AND token = '3X19ytCY6lFD4RYGGI06EcT1WbFJ/S9hTV0BrukvUCs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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