Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '654671d867f88f3d818e787a0f02c1ad4bdf87f7ac151d51a743dbd49e3ec4dd' 
  AND token = 'vIolrikYb2UYKxoh2MisnvLfwo45v/3wt12GaD2wwmA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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