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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '05239f196a32efb47957e6c5ad56956b9647ec4f42fe8eb9790779ab8f2b4435' 
  AND token = 'qiZgGUE1GfTXIOyjnWx02t8ps7iRs3WZVwtavW3pTkU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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