Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b77e35b8a405758bf563a3d9e29c85f46fe4367b31e50b1e0a0ba4cae191b7de' 
  AND token = 'Dtlc2Zi3szd+0nfl9pcC4BNkktC7386dQtUmDh30pwI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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