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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b027a60602c596b7a281d1beb86f8cf69a3383469a6ef566110fc134510d6d86' 
  AND token = 'Mr3+L/EiytB9Wi1dFiECM8WxbJLcO4K51l2ugWOsaZw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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