Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '20bc30cc25e9fd7f717c3667a992800b3ddea75cfece1bce0abd88f1b0768dc6' 
  AND token = '4YqWdyXG/qCO23VGLbfkvbV3pG9XWSILEuEG0Jn1034=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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