SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '02396855fd8d07f6c1817aafe104d152219bcf0eb159b4ef4fd8dfed4c7649f6' 
  AND token = 'Oqby7eHYZFcJh8KngMUxPEhBnQbmJgNTth5gMbVZqAU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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