Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'ffeaeb31e93a76fa569a7b43b3e3e31abf145b7b5005d8b46ed89079f8018e04' 
  AND token = 'AI5IK7biOyohnR5XXY3H3o7BqnA6OVH7IdzfjJN/6SQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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