SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '583600881435512419a26f094737667f5bb667106b1ad312f5ed8ffc747e0f4a' 
  AND token = 'qfKuLLjEFTJj9t0P20qG38Lgdaw1D2huOXYpWJFFf7U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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