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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '416458e6d7ca57c0630da60e8e91814722c4f230a559054687a70f8d60c0a126' 
  AND token = 'kfpXlPUlfelVx3G0TzqJLxovWx7RmZApBf1U/QsOXLE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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