SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '46f169f5fd455bdfb5c42eed53362eb5b0bcc75bcba8b4829c1efe745e238782' 
  AND token = 'vp0gWwrpBHps5GpKqwMJUYbtYac//U/i1lKjSfIkBSw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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