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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd0d69dabb0b5d8ddbaeaa8315684061ebca4e1a9b66f061022cc3b61de1cb40f' 
  AND token = 't5evAov+F8lbDZxmfKR7xumuXw1QOdFXeJN9rsHXxRQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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