Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eb289176e12e000ab13cb02ef77f8d8f4467a5ca448c5695ce7c89f068737468' 
  AND token = 'ACTkZ6rPjv9CNL3jgt/ncrQEQ6pLjbLaG0atCissRGI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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