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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0ed2f27fcfe99f59643fd17e262887a178bf3785a654c7cb2291b643c6fdd4e3' 
  AND token = '5NRZpZdzD+K8jMX75RqHIyC/44RiyyxKWz6hDQrxAWo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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