Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aead134ed1a64ced268e519d043b85fdd54f4abfd04a97822be3505ba1c525df' 
  AND token = 'FNE+XwSjWZ8NwLE3rNCWlMWI1dk0EmAuNPhsFmMtp6k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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