Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'da479db295a62dc8908b07ceb2b622923e8873b04b585fa5234de318ab5c7806' 
  AND token = 'r74BxKzobkr5V9p7GFKIMY6Onx/PWCNOTQW3CoYDCDk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}