Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd77d33ec4e49ca42424a15724f40b8c5b6a9b4d998e0677e6a78823c6658c692' 
  AND token = 'S7xEZa1RZWJMy7HpG4odJW2aWPbJ0hM2TQ4sdupuS+U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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