SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '5b9ea33774b0db96b55ad932fad27e89b9e0cd3924fbb40f1f76dab0e02740e5' 
  AND token = 'kzrDAhBe3TC0JAKcUuOdJrGBysS2wZjSM/MY9V5TT7o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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