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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '032e8ebcf844e96dbc22a4e26cf59bf610c25842cb559c358009575e9e09d76d' 
  AND token = 'eZaoCqwBTnnRcHotQlo7nAUszSdqj2tKXsqwyY8Hcro=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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