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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '96f2bf07a6bdf169dbcc919fb63613942ed0a323ed61f42b40b44fa8ab289a93' 
  AND token = 'HLf6K8eHFkb1kj+/6PWyGkI6fEO/VW1/A+I9XHFhZL4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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