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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ff818cd0f7659344fbf22ac3cd60b43ed669e793ac945cef0e97cb2cae2f1190' 
  AND token = 'JzJSKN6VHMWgMTGGNcIV+kkh0B1o54wE3MtQ0eBM+rc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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