SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'e0709572c05e0b03bd22621c4660afc519eb9ecb8bc9f89b6d7a70e183c2c1c5' 
  AND token = 'jNXshHJWZ+YIBSUZMBwMeRWl9lX7+SU5PE9QqsGYcpI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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