Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e0002bdc2058aa4df0f35aaf0f5acbf173c6c5fffb44813069db7eb91e95aedc' 
  AND token = 'IKgYYdvsGfae1RPRPrHgldd3loX6ZBv8ovUqlYgPMcY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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