Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eaeca2e31b6321f8ed36d4722bad59f1a3e2a4e205a2a7bbe25b60ebb341e26d' 
  AND token = 'ezeMFPkwMj/kVkYf1d9g0ua2FdUzh4xwS/VcDWWd0Yw=' 
  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"
    }
  }
}