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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ecf01f8b61cf909e8d3d2214e057e8a85084132ecfab868620229be5b879bb27' 
  AND token = 'pbFc9L2NnNgzD/K3ne860LQ9zMnvg9mgQ0i58eYY98Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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