Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e1fe8442b72e5a576ba67760d36e9396e7bb714e5657e5bbc8ffd8af3299d5b' 
  AND token = 'DDQEU01s8P6sy8IiIpJyzX6xxLKpdXLhJpqpT5nCk44=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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