Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ca3f1c5c2b9434092b111f293ed608694fa0e4ced3f64c772d1fc5c8d38f207a' 
  AND token = 'zVyT/A83mkWYaiXbwTUJ3lHW+4VSrtjvi3R8ohEzOnk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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