Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b9e7be4d092e7cbcca4776408932546b77e8b0431265eade034b589d7fd9233a' 
  AND token = 'ZctgLgWJjhXFDmMXr0lnDf3CW2ZqsxNIzWgl7klHDwY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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