Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0a8864b090266f8f837d18dcdfcbaa86d6a22fd791d053f9f6b0265ff980ac11' 
  AND token = 'aMPIB1NlqHjMAFJPVUY8BCRk0jZ5VG/e0oTUiPSIBjw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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