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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4a4587dce9aada877232b9af3ba97ecbbffa36674e67534cf45095ae6f60b65f' 
  AND token = 'iFR6YuCAjSUJlycbD5RFoO7EDt31OvIJJ/XVWJ0mnB8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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