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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bda83a5659550b78de9d8196e068fdb24cf76b08a7abefa2be974468e689e8e6' 
  AND token = 'ZINbsmunuQsTutnE8Dj9QnFQpMeXK9j2JYXFtQdEFOU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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