Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '375e2d2708229db10d55dbe2b98e5efed3ff579a267c469f7f9ad7f62b7dfad6' 
  AND token = 'rPrvZjI6rc0fgWug+io2wp6GXHP8yN8JgPWIwJdjeMg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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