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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '63da05e098b81095ae7ba17693a9554b753b5dcfdc0024c19a95b95999d36eed' 
  AND token = 'Yokq8RJhkbS1GU2TSPHuqmFLDS/e2V75/khvF3O9yNI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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