SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'e94e3b4038f7c6d0624b9a1061e11bb65ab764551d3b2f69ec3189ac5c623707' 
  AND token = 'QaDDwG0+jwXFD4jTmlhnD3vfjE60M/I5kgBDoQLx5vE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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