Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '334583f1c4b47bab077ba8f88def93714fe31caba018dbb0cba731f8b37975ff' 
  AND token = 'ThaCrpLPK1Hp9V3y1keyfze8mC68aYmtKLBwiPeTXdo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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