Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b690ba053f3cd78cb58c4c7bc88d7e6f0c72bd8536096a59bcff276023e21cd4' 
  AND token = 'UfLub9qacRDp/qcwAlm7wK5lz1Q0orkhr1jLCSJHJlE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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