SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '0381e20c922bf76aed40b99d2fbd64bf17750efc8566ea893248f0e722bd8e58' 
  AND token = 'oiYzqG7VgdJvVa+cA7wXFW5rpga9moct0WreOZ4V1I8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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