Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8f94be32c7ba6a47548641121e052c2dac486aa14b151b4065cecf06a23761f8' 
  AND token = 'eKGRv7Qf6BiMBV48FLzwAOgxQnAdWEBs3AkmT0G7SGE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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