Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f9f12851890e8c7c830889eb26140f4e1013de645bd8a7364ca32b92d633373e' 
  AND token = 'V1gHUyjAyRNsltJyNbLp3/OfxgRf5FJTWWriWrDSDmo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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