Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd683375b0932dce592b309b41878dfbe0b01abc08ae878a6dabfead0a783b09d' 
  AND token = '3bpFawPwhT4wgthEYyuVE73RTwxIwSNBs4dgUyUxXQk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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