Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '90fa93e4fc006c9be0db3eb1febdae25a8e5f00ca97d063dfcb315dfb548cc42' 
  AND token = 'xPcDay1PlYMJ1myMLPTK2QwpYvAt+uJHwyAab1Jj5II=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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