Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba60d7ab3d6d5e0e6d7a2676bf518b8c1569303b3b7e56aaa2d5867e51e45de6' 
  AND token = '/nEBlbfYxu1YszotHIiGuA2cfqwI5olvydMqGbySReI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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